Mazda 3 Sedan 2020 Owner's Manual page 518

If Trouble Arises
Flat Tire
Antitheft wheel lug nuts cannot be
installed on a steel wheel spare tire.
When installing a temporary spare tire,
use one of the original lug nuts in place
of the locking lug nut. The original lug
nuts are stored inside your Mazda.
1. Antitheft lug nut
2. Special key
To remove an antitheft lug nut
1. Obtain the special key for the
antitheft lug nut.
2. Place the special key on top of the
antitheft lug nut, and be sure to
hold the key square to it. If you
hold the key at an angle, you may
damage both key and nut. Do not
use a power impact wrench.
3. Place the lug wrench on top of the
key and apply pressure. Turn the
wrench counterclockwise.
To install the antitheft lug nut
1. Place the special key on top of the
nut, and be sure to hold the key
square to it. If you hold the key at
an angle, you may damage both key
and nut. Do not use a power
impact wrench.
2. Place the lug wrench on top of the
special key, apply pressure, and
turn it clockwise.
Nut tightening torque
N·m (kgf·m, ft·lbf)
7-12
108―147 (12―14,
80―108)
▼ Mounting the Spare Tire
1. Remove dirt and grime from the
mounting surfaces of the wheel and
hub, including the hub bolts, with a
cloth.
WARNING
Make sure the mounting surfaces
of the wheel, hub and lug nuts are
clean before changing or replacing
tires:
When changing or replacing a tire,
not removing dirt and grime from
the mounting surfaces of the wheel,
hub and hub bolts is dangerous.
The lug nuts could loosen while
driving and cause the tire to come
off, resulting in an accident.
2. Mount the spare tire.
3. Install the lug nuts with the beveled
edge inward; tighten them by hand.